Barratt Due

Abstract This is the first paper in the literature to focus on CMBX price formation with dual techniques of liquidity estimation. In this paper, we introduce a generalizable method using principal component analysis to estimate daily risk decompositions of default, interest rate, liquidity and excess liquidity from previously simulated reduced form monthly risk decompositions. Our method generates these measures for CMBX. To assess liquidity estimates, we compare our risk decomposition measures of liquidity to classical microstructure effective bid–ask spreads, daily. We find our measures to be significant in explaining effective bid–ask spreads over 12 years of daily history and in 20‐day forecasts.

Using the Barratt Improvement Model to improve individual work performance involves following guidelines essentially addressed to working individuals, rather than to Human Resource Development practitioners. Argues that objectives should be balanced among professional, family, social, physical, mental, emotional, spiritual and other needs to ensure a balanced quality of life.

A series of 252 isolated aortic homograft valves in 248 patients have been followed for 9 to 16.5 years (mean 10.8). The valves were sterilized in antibiotic solution and stored in a nutrient medium at 4 degrees C and were nonvital. There were 15 in-hospital deaths (6%) and a mortality of 2.7% in patients undergoing an elective first operation. Actuarial survival with the study valve in situ was 57% at 10 years and 38% at 14 years. Only 8.4% of the patients died late from homograft valve failure, chiefly because of failure to refer patients with endocarditis for reoperation or because reoperation was refused in elderly, frail subjects. Incompetence was the sole cause of valve failure and was due either to valve wear or endocarditis. Significant incompetence required reoperation. On actuarial analysis, freedom from significant incompetence for the entire group was 95% at 5 years, 78% at 10 years, and 42% at 14 years. Factors increasing the risk of significant incompetence due to valve wear on multivariate analysis were increasing donor valve age (greater than or equal to 55 years), recipient age (less than 15 years), and an aortic root diameter over 30 mm. Analysis of the patient group that excluded each of these variables (low-risk group), which comprised 61% of the study population, indicated freedom from significant incompetence due to valve wear of 98% at 5 years, 94% at 9 years, and 56% at 13 years.

A modified method for the measurement of total creatine phosphokinase release from venous blood samples taken four-hourly after myocardial infarction has been used in 43 patients admitted to a Coronary Care Unit. The fractional decay rate (Kd) of enzyme activity has been measured by a standardized method in each patient, and accuracy of the calculation of total enzyme release has been improved by allowance for individual variations in decay rate, and discarding of data from which decay rates cannot be measured within confidence limits of less than plus or minus 15 per cent. Total enzyme release was greater in cases of transmural infarction than in patients with subendocardial infarction, and showed a good positive correlation with clinical indices of the extent of myocardial damage. As noted by previous workers, this method allows for the measurement of the rate as well as the extent of enzyme release, and so should prove useful in the clinical evaluation of therapeutic agents which might accelerate or retard the rate of myocardial necrosis in patients with acute myocardial infarction.